Project modernization (#630)

* Fixed boats falling and a TP glitch #266

* Replaced every C-style cast with C++ ones

* Replaced every C-style cast with C++ ones

* Fixed boats falling and a TP glitch #266

* Updated NULL to nullptr and fixing some type issues

* Modernized and fixed a few bugs

- Replaced most instances of `NULL` with `nullptr`.
- Replaced most `shared_ptr(new ...)` with `make_shared`.
- Removed the `nullptr` macro as it was interfering with the actual nullptr keyword in some instances.

* Fixing more conflicts

* Replace int loops with size_t and start work on overrides

Minecraft.Client/TextEditScreen.cpp

@@ -35,7 +35,7 @@ void TextEditScreen::removed()
     Keyboard::enableRepeatEvents(false);
     if (minecraft->level->isClientSide)
 	{
-        minecraft->getConnection(0)->send( shared_ptr<SignUpdatePacket>( new SignUpdatePacket(sign->x, sign->y, sign->z, sign->IsVerified(), sign->IsCensored(), sign->GetMessages()) ) );
+        minecraft->getConnection(0)->send(std::make_shared<SignUpdatePacket>(sign->x, sign->y, sign->z, sign->IsVerified(), sign->IsCensored(), sign->GetMessages()));
     }
 
 }
@@ -52,7 +52,7 @@ void TextEditScreen::buttonClicked(Button *button)
     if (button->id == 0)
 	{
         sign->setChanged();
-        minecraft->setScreen(NULL);
+        minecraft->setScreen(nullptr);
     }
 }
 
@@ -82,7 +82,7 @@ void TextEditScreen::render(int xm, int ym, float a)
     drawCenteredString(font, title, width / 2, 40, 0xffffff);
 
     glPushMatrix();
-    glTranslatef((float)width / 2, (float)height / 2, 50);
+    glTranslatef(static_cast<float>(width) / 2, static_cast<float>(height) / 2, 50);
     float ss = 60 / (16 / 25.0f);
     glScalef(-ss, -ss, -ss);
     glRotatef(180, 0, 1, 0);